content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * ------------------
   * PointerNeedle.java
   * ------------------
   * (C) Copyright 2002-2008, by the Australian Antarctic Division and
   *                          Contributors.
   *
   * Original Author:  Bryan Scott (for the Australian Antarctic Division);
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * Changes:
   * --------
   * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
   * 26-Mar-2003 : Implemented Serializable (DG);
   * 09-Sep-2003 : Added equals() method (DG);
   * 08-Jun-2005 : Implemented Cloneable (DG);
   * 22-Nov-2007 : Implemented hashCode() (DG);
   *
   */
  
  package org.jfree.chart.needle;
  
  import java.awt.Graphics2D;
  import java.awt.geom.GeneralPath;
  import java.awt.geom.Point2D;
  import java.awt.geom.Rectangle2D;
  import java.io.Serializable;
  
  /**
   * A needle in the shape of a pointer, for use with the
   * {@link org.jfree.chart.plot.CompassPlot} class.
   */
  public class PointerNeedle extends MeterNeedle
                             implements Cloneable, Serializable {
  
      /** For serialization. */
      private static final long serialVersionUID = -4744677345334729606L;
  
      /**
       * Draws the needle.
       *
       * @param g2  the graphics device.
       * @param plotArea  the plot area.
       * @param rotate  the rotation point.
       * @param angle  the angle.
       */
      @Override
      protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea,
                                Point2D rotate, double angle) {
  
          GeneralPath shape1 = new GeneralPath();
          GeneralPath shape2 = new GeneralPath();
          float minX = (float) plotArea.getMinX();
          float minY = (float) plotArea.getMinY();
          float maxX = (float) plotArea.getMaxX();
          float maxY = (float) plotArea.getMaxY();
          float midX = (float) (minX + (plotArea.getWidth() / 2));
          float midY = (float) (minY + (plotArea.getHeight() / 2));
  
          shape1.moveTo(minX, midY);
          shape1.lineTo(midX, minY);
          shape1.lineTo(maxX, midY);
          shape1.closePath();
  
          shape2.moveTo(minX, midY);
          shape2.lineTo(midX, maxY);
          shape2.lineTo(maxX, midY);
          shape2.closePath();
  
          if ((rotate != null) && (angle != 0)) {
              /// we have rotation huston, please spin me
              getTransform().setToRotation(angle, rotate.getX(), rotate.getY());
              shape1.transform(getTransform());
              shape2.transform(getTransform());
          }
  
          if (getFillPaint() != null) {
              g2.setPaint(getFillPaint());
              g2.fill(shape1);
          }
  
          if (getHighlightPaint() != null) {
              g2.setPaint(getHighlightPaint());
              g2.fill(shape2);
          }
  
          if (getOutlinePaint() != null) {
              g2.setStroke(getOutlineStroke());
              g2.setPaint(getOutlinePaint());
              g2.draw(shape1);
              g2.draw(shape2);
          }
      }
  
      /**
       * Tests another object for equality with this object.
       *
       * @param obj  the object to test (<code>null</code> permitted).
       *
       * @return A boolean.
       */
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (!(obj instanceof PointerNeedle)) {
              return false;
          }
          if (!super.equals(obj)) {
              return false;
          }
          return true;
      }
  
      /**
       * Returns a hash code for this instance.
       *
       * @return A hash code.
       */
      @Override
      public int hashCode() {
          return super.hashCode();
      }
  
      /**
       * Returns a clone of this needle.
       *
       * @return A clone.
       *
       * @throws CloneNotSupportedException if the <code>PointerNeedle</code>
       *     cannot be cloned (in theory, this should not happen).
       */
      @Override
      public Object clone() throws CloneNotSupportedException {
          return super.clone();
      }
  
  }
  